It depends a bit on where in Spain - if it's in the south then the earlier course might be better simply because it won't be so hot! CELTA is intensive enough without struggling with high temperatures.

Both courses will leave you ready for summerschool jobs, although again, because employers have already started advertising summer school jobs maybe the earlier course would put you in the better position.

Yes it is in the south of Spain in Seville!! So it will be really hot in july!!

Are there many opportunities for summer schools? I don't want to be struggling after my course and i don't really want to have to come back to the uk and then head out again for September as many people say most of the jobs come out then.